Savar police Officer-in-Charge Based Mia said Shamim Ahmed, 34, was being escorted to Narayanganj from Natore Jail.
Three policemen were responsible for Shamim Ahmed on a public bus. During the journey, the policemen fell asleep. Shamim took advantage of the situation when the bus reached Amin Bazar and fled.
Later, police conducted drives at several locations, but could not trace Shamim.
Superintendent of Police Biplob Bijoy Talukdar said the three policemen were suspended for negligence in duty.